if(document.getElementById('relative'))document.getElementById('relative').innerHTML='<div>前一篇：<a href=\"/other/chem_knowledge/show.asp?id=282751\" target=\"_self\">正己烷（ n-Hexane )之简介</a></div>\n<div>后一篇：<a href=\"/other/chem_knowledge/show.asp?id=292660\" target=\"_self\">什么是车用汽油和柴油</a></div>\n';